photoheliograph
solar telescope
coronograph
astrograph
phototelescope
heliograph
telescopical
digiscope
phototelescopic
telephotometer
perspective glass
reflector
water telescope
Schmidt camera
portrait lens
optical telescope
robodoc
startracker
refractor
spectroheliokinematograph
radio observation
scopeful
radiospectrometer
teleotoscope
Dobsonian
spectroheliometer
monoscope
Schmidt telescope
telescopically
subreflector
telespectrograph
granulation
tailpiece
spyglass
field glass
raft
telestereoscope
coelostat
terrestrial telescope
telescopic
telespectroradiometer
glass
aerial camera
refracting telescope
coronagraph
solargraphic
sunshield
speculum
first light
coude telescope